EnumerateDevices.cs

private static IEnumerable<SP_DEVINFO_DATA> GetDeviceInfoData(SafeDeviceInfoSetHandle devInfoSet)
{
  var did = default(SP_DEVINFO_DATA);
  uint didSize = (uint)Marshal.SizeOf(did);
  did.cbSize = didSize;
  uint index = 0;
  while (SetupDiEnumDeviceInfo(devInfoSet, index, ref did))
  {
    yield return did;
    ++index;
    did = default(SP_DEVINFO_DATA);
    did.cbSize = didSize;
  }
}